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Electrically tunable guided mode resonance grating for switchable photoluminescence

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posted on 09.12.2021, 22:10 by Alok GhanekarAlok Ghanekar, Abhishek Mukherjee, Michelle Povinelli

We present a guided mode resonance grating based on the incorporation of an electro-optic material with monolayer WS2. The grating is designed to exhibit highly selective directional photo-luminescent emission. We study the effect of doubling the grating period via the introduction of an alternating index perturbation. Using numerical simulations, we show that period doubling leads to formation of a photonic band gap and spectral splitting in the absorptivity (or emissivity) spectrum. We anticipate that this effect can either be used to switch on and off the emissivity at a fixed wavelength, or toggle between single- and double-wavelength emission.

Funding

Indo-US Science and Technology Forum (IUSSTF) Viterbi program.

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Email Address of Submitting Author

aghaneka@usc.edu

ORCID of Submitting Author

0000-0002-8181-481X

Submitting Author's Institution

University of Southern California

Submitting Author's Country

United States of America

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